Here I am explaining the how loopback process configuration in Group Policy? if you have folder redirection policy enabled for all the users, this policy does not want to sync in certain computers in domain. you can use the below configuration for enable this policy.

For doing this we have to login to the Domain controller group policy management system In computer configuration Under Administrative Templates/System/Group Policy/Enable the Configure user Group Policy loopback processing mode.

Then come under the User configuration PoliciesWindows SettingsFolder redirectionDocuments (Properties)target select the basic -Redirect everyone’s folder to the same location. and the target folder location- Redirect to the local user profile location

In settings- grant user exclusive rights to Documents and policy removal- Leave the folder in the new location when policy removed.